C# Utility to convert Powerpoint xml Presentation to PPTX format

C# Utility to convert Powerpoint xml Presentation to PPTX format Need a simple C# utility to convert a Powerpoint xml Presentation file to a PPTX format. The XML file is nothing but the actual Power point just "Saved As" and XML. I need this utility / Class library to convert the XML back to PPTX format. Attached file is a sample XML file I have. You can test your utility to see how it will convert to a PPTX file. You can send it to me to so I know you can do it. Let me know if you are going to use any third party utilities or have any questions